I prefer [name_f]Elizabeth[/name_f] it just sounds classier, but I adore both [name_f]Elizabeth[/name_f] and [name_f]Catherine[/name_f]
I like Elizabeth’s nicknames better (especially [name_f]Ella[/name_f] and Eliza), but as an actual name, I like the sound of [name_f]Catherine[/name_f] more!
[name_f]Catherine[/name_f], no strong reason for preffering it, it’s just a bit nicer to me personally.